I did not make this content, it was made by by bud, highclassbean, and I'm just uploading it for him so all my subscribers will see it. Please go to his profile and tell him how awesome his is and subscribe for more! Here is his own description:

Im a super excited to start doing this, I hope with these up coming posts more people will get to know and love warhammer 40k as I and many others do. for all other huge 40k fans please feel free to message me or leave me a comment at (highclassbean) about anything really important i may have overlooked, anything I messed up, or things you would like to see in the future posts.
for the people wanting to get into the lore more but are unwilling to wait for my next post, all this information and way more can be found at warhammer40k.wikia.com/wiki/Warhammer...
orwh40k.lexicanum.com/wiki/Main_Page#.U...

The armor is huge because the guy inside it is also huge. The Emperor wanted to make it clear as day that these guys were not to be ****** with, so he made them as huge as possible. Hell, that's pretty much how the entire Imperium of Man works. Bigger is better.

Just so you know, he averaged at standing at approximately 22 feet tall. In 40k there's a thing most commonly referred to as the Warp. The laws of Reality do not apply there, and souls and emotions and crap take place there. Kind of like 4chan, but in alternate dimensions.
Certain living beings have stronger souls and thus a deeper connection with the Warp because genetics work like that.
Emps is made of around half a million people all committing suicide at once. He's inarguably the greatest psyker in the galaxy, putting to shame even the faggoty space elves that ********** a god of ejaculating to death into existence.
That light you see around his head is reality itself backing off and saying "Watch out guys, we've got a badass here."
Conquering the galaxy is one thing. He did it while not once ceasing to be this epic.

1kyearsago is the Tau coming to power and taking in the Kroot and Vespid races as vassals, and 300 years ago is the first Tyrhannic war where Hive Fleet Behemoth assaulted the galactic southeast and the star-empire of Macragge.